The number of echoes combined into a single image or image set in multiple echo imaging sequences or echo-train techniques such as rapid acquisition with relaxation enhancement (RARE), fast-spin echo (FSE), and turbo spin-echo (TSE). In RARE imaging, the ETL typically equals the acceleration factor.
As for tooth pain, it is caused by a reaction of the nerves inside a tooth's pulp chamber with the severity dependent upon the type and degree of the stimulus. What follows are some examples of symptoms you may be feeling and their possible causes.
If we chip or break a tooth our nerves can become exposed very easily causing pain. Exposed nerve tooth pain can be very painful and even little things can cause the pain to increase. Hot and cold food and drink can cause an exposed nerve to increase in pain.When eating, touching the nerve can also cause tooth pain too.Once we have an exposed nerve, a trip to a dentist is needed to treat and ultimately heal the tooth. In the meantime however, what can you do for exposed nerve tooth pain, and how can you relieve it until you reach a dentist.asically dab a cotton bud with oil of cloves and then apply it to the affected tooth causing the pain. Be careful not to touch the gums as this may cause irritation. The oil of cloves will work to numb the tooth and provide exposed nerve tooth pain relief temporarily.